Justin Bieber was joined on stage by Chris Brown at his Sydney gig last night (April 28).

Bieber was rumoured earlier yesterday to have cancelled his sold-out show in Sydney after a accident in Bali.

The singer performed an acapella version of Brown's 'With You' before introducing him to the stage to duet on track 'Look At Me Now'.

Justin Bieber tweeted fans after the show: "And they thought we might cancel tonight. Look at Me Now! I love Australia! #SWAG."

Meanwhile, Justin Bieber could be set to star alongside Mark Wahlberg in an upcoming film, it has been revealed.

(by Holly Frith)